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try: file = open("name.txt")except Exception as e: print(' %s ' %e)finally: file.close()
try: raise NameError('helloError')except NameError: print(' my custom error ')
fd = open('name.txt')try: for line in fd: print (line)finally: fd.close()
使用上下文管理器写法:
with open('name.txt') as f: for line in f: print(line)
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